Damper mounting and regulating



Dec. 12,1939. f GN. l.. KEREN'TOFF 2,183,292

DAMPER MOUNTING AND REGULATNG MEANS Filed Oct. ll, 1938 2 Sheets-Sheet 1 INVENTOR. arrL/fa' AKEN/waff ATTURNEYI Dec. .1 2, 1939.

G. L.. KERENTOFF DAMPER MOUNTING AND REGULATING MEANS Filed Oct. ll, 1938 2 Sheets-Sheet 2 INVENTOR. Garn/ea l.. KMF/waff BY Y i @mi ATTORNEYI.

Patented Dec. 12, 1939 l UNITED STATES time .PATENT ,GFHC'FE DAMPER. MOUNTING AND REGULATING MEAN Gottlieb L; 'Kerentofl Cincinnati, Ohio Application October 11,1938, Serial No..- 234,493

i-fbeen employed, Which, 'hoWever,- necessitated either thel fastening of these regulators to the damper after the damper is lplaced lWithin the conduit, duct or pipe, or else necessitated the temporary deforming of the ductl or pipe in order to -place the-'damper therein. Another disad- 'fvantage of the damper in the past Was'that their amountingnecessitated a clearance'between the damper and interior of the conduit, duct or pipe, thereby materiallycutting down the eiciency of--the damper. By the mechanism of the present inventioinall of these difliculties are eliminated.y

It is therefore an object'of this invention to jprovide a damper regulator which can be readiiy yplaced iny position vfor mounting they damper Withm the -duct or pipe. j

Another `vobject of this invention is 'the provision o'f a vdamper mounting and regulating `means which can loe-employed Without deforming vin "any-manner the ductor pipe, so that th'e'pipe 5 or duct at all times retains its original and desired shape; Another object of this invention is -the pro- "vision of a damper mountingrand regulating means whereby the damper, When oncemounted 0 in position,-is definitely prevented from'inadvertent disassociation from the pipe or duct and is retained in position until positively removed therefrom. l

Another object of this invention is the pro-- .5 vision of a vdamper mounting 'and regulating mechanism which is `readily reversible to place the vcontrol at either side thereof, and `can bev employed'vvith square, rectangular or round pipe, and maybe employed as a regulating damper, splitter damper or a volumev damper. l Other objects and' advantages of the present invention'should be readily apparent byreference to the followingy specication considered in conjunction with the `accompanyingdraws/ings forming a partthereof and it is to be understood that any modifications may be made in the exact kstructural detailsy there shown and described, within the scope of the appended claims, Without ldeparting from or exceeding they spirit ofthe invention.

Y In thedrawingsy Fig. lis aplan View of a conduit orduct system rshovving the damper control in .various positions, and .for accomplishing :the vseveral functions of a damper.

' nection isillustrated in Fig. 2. f

Fig. 2 is a horizontal,V sectional View through a circular pipe showing a damper with the mounting and regulating means of this invention in position thereon.

Fig. 3 is an enlarged, fragmentary, transverse,""5 sectional View, taken on line 3 3 of Fig. 1.

Fig. 4 is a fragmentary, sectional View, ytaken on line l-li of'fFig. 3v. f

Fig. 5 is aview of a portion of Fig; 3 showing the parts in lpositions prior to the final mountingflo of the damper. l v

Figs. 6 and '7 are respectively'perspective'views of the parts of the damper regulator and mounting means villustrated in Figs. 3, tand 5.

Fig. 8 is an elevational, sectional View, showingitm a modification in the construction of vthe damper 4 mounting and Aregulating means.

Figs,'9 and 10, similar "to Figs. 6 and 'bare perspective views of the 'parts ofthe 'modified damper mounting and regulating means of Fig. 8.* Referring to Fig. 1, there is illustrated a' main Vduct or conduit i5, through which is passing air, and from"Which is a side branch Alland end .branches l-l'l and i8. y.There is illustrated at I9v va vhandlefor a damper within'the main duct 15u25 which Would-actas a regulating damper ora volume damper to `c'ontrolthe amount of flow through the main vduct l5.' At 2ER' and`-2l areA Yillustratedv similar handles for regulating the vposition of dampers, which may be referred toivas splitter dampers, for splitting the oW inthe main conduit l5 into the Yside branch lyor unequally splitting the flow from the main conduit l5 into branch conduits 'l'land 18. As will later be pointed out, the handles i8, 26 and 2l are at-i tached to the edges of the dampers Which-they v control, but it is to be noted that .the connection of thel handle iltoits particular damper may beat the center thereof, and which type of con- Referring specifically to Fig. 2,y there is'illustrated a round or circular pipeor conduiti 22 having interiorly thereof the damperl. Mounted along the center of the circular damper 23, at

opposite ends thereof, are the damperfattachings mechanismsZi and 25. `The attaching mechanism 25 has afportion v,extending fbeyond'the pipe, to which the handles i8, 2li-.and 2i may be attached forl operating or regulating the position of thedamper 23. "5o

The positioning of dampers in conduits, ducts y or pipes, such 'as has just been described, is Vcommon practice; and .notinventicn in this: japplication; however, the 'means whereby the damp- .ers aremounted and operatedis invention in'this 55 vwill protrude.

application, and this structure is commonly referred to as a damper regulator.

Referring particularly to Figs. 3 to 7 inclusive, the damper regulator, as noted above, comprises in general a damper plate 23 which has secured thereto the damper attaching and regulating mechanisms 24 and 25; since these damper attaching and regulating mechanisms are substantially duplicates of one another, it is deemed sufficient if but one of them be described in detail. Accordingly, and with reference to mechanism 25, use is made of a plate 26, having its upper end bent normal thereto, as at 27, then downwardly parallel with the body of the plate 26, as at 28, then inwardly toward the body of the plate and parallel with the portion 21, as at 29. This results in a structure wherein there is provided an attaching plate 26 having at its upper end a passageway 52 of angular cross section, as seen most clearly in Fig. 4. The plate 26 is provided, near its lower end, with a pair of apertures 30 adapted to register with similar apertures in the damper to receive suitable attaching means, such as rivets 32.

Passing through the angular passage Way 62 is a bolt or axle, indicated in general by the reference numeral 63 and illustrated most clearly in Fig. 7, which comprises a body portion 33 having its one end threaded as at 34, and its other end upset to provide a hook as at 35. The end of the body portion 33 is provided with a groove or slot 36 which extends across the body portion 33 in the same direction as the hook 35. The ends of the bottom 29 of the rectangular passage way 62 of the plate 26 are removed, as at 31 and 38, a distance equal to the thickness of the bolt or shaft hook 35, so that the bolt, when in operative position, is completely within the confines of the plate 26, as clearly illustrated in Fig. 3.

In assembling the damper, the plates 26 are attached to the damper 3|, as shown in Fig. 3, near one edge thereof, or attached to the damper along its center line, as shown in Fig. 2; Whereupon, the bolts or axles 63 have their threaded ends inserted within the passage way 62 of the plates to a position illustrated in Fig. 5. The duct, conduit or pipe, as the case may be, such as duct I5, is punched to provide apertures 40 and 4I which are diametrically opposite one another, and at the points where the damper axles The assembled dampers are now inserted Within the duct until the axles or bolts 63 align with the apertures 40 and 4 I; whereupon, they are pushed through the angular passages of the plate 26, so that the threaded ends thereof project beyond the duct I5. It should be noted that the fronts or portion 28 of the angular passage ways 62 are provided at opposite ends thereof with holes 4 2, so that after the damper is mounted ,within the duct 40 and the bolts or axles projected through the duct apertures 40 and 4I, a cotter key or the like 43 may be placed therein to prevent the said bolts or axles from being pushed out of their passage ways while being Worked on on the outside of the duct.

After the damper is in the position just described, and since the bolt or axles 63 has an angular cross section and the aperture in the duct circular so that the axle may turn therein, a washer 44 is mounted on the bolt of the mounted mechanism which is considered the tail or back end of the damper, or the one which does not receive the regulating handle, and'indicated above as the mounting mechanism 24. A nut 45 is now screwed on the threaded end 34 of the tail bolt or axle and is screwed down with such force as to frictionally clamp the damper, Washer and duct or pipe with sumcient friction to hold the damper in any position of adjustment. A second nut 46 is now threaded on the tail piece bolt to act as a lock nut for the parts and prevent the nut 45 from being inadvertently backed off and relieving the friction on the damper 23. Substantially the same procedure is gone through with at` the other or head end of the damper, in that a washer 4l is positioned on the bolt or axle against the pipe and backed up by a nut 48 with a portion, such as 49, of the bolt or axle projecting ahead of the nut 48. 'I'he nut 48 acts in combination with the frictional positioning of lock nuts 45 and 46 for securely clamping the damper in any position of adjustment, being backed oi or loosened when a change in position is desired or necessary. The handle, such as I9, is provided with an aperture, angular in cross section, corresponding to the angular cross section of the bolt, and is readily inserted on and removable from the projecting head end of the damper axle extension 49. It will be readily appreciated that, if desired, a nut similar to nut 48 may be screwed on the projecting end, of the bolt or axle to hold the handle permanently thereon if desired.

The foregoing description is clearly illustrated in Fig. 2, and when it is desired to cover the conduit, duct or pipe with asbestos or other insulat-.I ing material, the said covering 50 is put on over the lock nuts 45 and 46, as clearly illustrated in Fig. 3, without, however, covering the nut 48 at the head end of the damper. In this connection, the rst washer 4l is covered by the insulating-f material 50, while the extension of the bolt or axle 63 is encircled by a spacer sleeve 5I of a length substantially equal to the thickness of the insulating covering and the insulating covering is disposed around the outside of this spacer sleevej, A second washer 52 is then employed which is located on the outside of the insulating covering 5U and the parts then secured in position by the nut 48, with the handle I9 beyond this nut, as above described. With this construction, the,... damper can readily be operated or adjusted without interference from or interfering with the asbestos or other insulating covering around the conduit.

From the foregoing, it will now be appreciated that there has been provided a damper mountingd and regulating means which will enable a damper to be readily installed, since the body portion of the mounting means is attached to the damper when in a position exteriorly of the duct, con-5 duit or pipe, instead of having to attach this when in position Within the pipe as is the case with certain damper regulators here-to-fore employed. It will further be noted that the damper can be inserted within its duct, conduit or pipe, without1 in any Wise deforming the pipe, again as is neces-"` sary with some of the heretofore known damper regulators, and in which case, the body attaching plates and bolts are formed integral with one another. It will also be noted that with thee damper as just described, the tail end of the damper is permanently mounted in position with respect to the damper and the conduit, thereby preventing the inadvertent disassociation of these, as has been the case in the past, and it7 will further be noted that the damper can be readily locked in any position of adjustment; first by the friction lock nuts 45 and 46, and second by the head end lock nut 48. Furthermore, with the damper mounting and regulating means 'oigthis. invention, athedamper will be Vmade to comv pletelyf. iillthe areaof thaconduit, ductor pipepA since noclearance of' any kindl around. this damper is necessary for anyA purpose whatsoevenas is thecase with prior structures. ItV should .also bei' noted that-the. groove 36,- inz-the -tree end of ethe-l bolts or` axles, extends inithe samedirection asy the damper, and that this grooveuor slotlat all times indicates theposition of thelv damper, and' therefore eliminates the necessity for f a dial,- Valthough one may be readily employed if desired..4

In Figs. 8, 9 and 1i) is illustrated a slight modi'- i'lcation ofthe parts of the damper mounting and control mechanism, in that the plate passageway v 62 is not provided with the bottom cut outs 3l and 38,-and isfurther devoid of having holes dit in thefront 28 of the plate passageway. Instead, the plate 26', illustrated in Fig'. 9, hasvits bottom ZS'Ythe. same length as its top'2'i and front k28', andis `further provided in its top and bottom with aligned perforations 53 and 513. The bolt or f axle 6.3', used with the plate 2%', has a body portion S3'and a threaded portion 34', similar to the body portion and threadedv portion of Fig. 7. Instead, however, of having the upset or hooked end 35 of Fig. 7, the body portion 33 of Fig. 10 is extended, as at 55, and `is provided, in one face thereof, with notches El and 5t. These notches, like the hooked ended, extend in the 'same direction as a ysiot 36' in the end of the bolt or axle 53"; It should be notedthat the cross sec-- tion of the bolt or axle of Fig. l is sub-stantially equal to the passagewayv of the mounting plate V26'. The plate 26' is attached to the damper in the same way that the plate 25 is attached and above described, and the damper, with these plates thereon, is mounted within the pipe, 'conduit or duct with the passageways in line with preformed apertures in the pipe, duct or conduit, :whereupon the bolts or'axles of Fig. 10 are inserted from the outside through these aligned apertures and passageways, although it may be inserted from the inside, asy above described. Depending upon whether or notthe pipe, duct or conduit is to be left uncovered or covered, the bolt or axle 53'-, at the headend of the damper, will be more or less inserted within its passageway. In other words, if the pipe is to remain uncovered, the bolt is to be inserted 'to the position shown in Fig. 8, namely with the innermost notch E in line with the aperture 53 or 54, farthest removed from the pipe, duct or conduit, whereupon a fastening means, such as a cotter key 59, is inserted through the said perforations 53 or 5ft and the aligned notch 55, and thev legs 6l) and 6l of said cotter key spread to retain the same in position. If, however, the pipe is to be insulated or covered, say to a half inch, as illustrated in Fig. 3, the bolt or axle of Fig. would be positioned to have its center notch 5l aligned with the desired aperture 53 or 5A, while, if an extra heavy covering of insulating material is to be used, the notch 58 would be employed for this purpose. Otherwise, the mounting of the damper would `be identical with that above described in connection with Figs. 3 to 7 inclusive.

In connection with the modif-led structure of Figs. 8 to 10, it will be readily appreciated that the notch 5G, 5l' or 58 and element 58 co-operate with one another for limiting the axial movement of the axle when the nuts 45, 45 and 48 are screwed thereon, thev same as the upset or hook portion of the bolt or axle first described.

What is claimed is:

1. In a device of the class described, the combination of a mounting plate having 1a passageef Way, an axle clamping bolt separable from 'the' mounting plate and axially shiftable throughthe passageway, said axleV clampingbolt having yone.-

end 'threaded for lock and clamping nuts #and the other end vertically slotted, said mounting plate passageway walls having apertures therethrough adapted to be aligned with the axlefclamping bolt slot, and means extending through the aligned nation of a mounting plate having a passageway, an axle clamping bolt separable from the mounting plate and' axially shiftable through the pas-V sageway, said axle clamping bolt having one end threaded and having formed in one side thereof a slot located between the threads and its other end, f said mounting plate passageway vwalls yhaving formed therein axially aligned apertures adapted to be aligned with the axle clamping bolt slot, and

v removable meansextending through the aligned passageway walls apertures and axle `clamping bolt slot for securing the axle'clamping bolt against axial movement in the passageway.

- 3. In a device of theclass described, the comb-i-v Y nation of a mounting plate having -a passageway, an axle clamping bolt separable from the mounting'plate'and axially shiftable through the paspassageway walls having-formedV therein axially` aligned apertures adapted to be alignedfwith any Y one of the -side slots of the axle clamping bolt-'toI ing the axle clamping bolt against axial movement in the passageway.

4. In a damper regulator of the class described, for use with a damper within a duct, the combination of a mounting plate at one end of the damper and having a passageway, an axle clampmore or lessv project the threadedr end-thereof;` beyond the mounting plate, and removable mea-ns*- extending through the lalignedl passageway 'wallsy apertures and axle clamping bolt slots for secur` ing bolt separable from the mounting plate and axially shiftable through the passage through and beyond the duct, said axle clamping bolt having' the end projecting beyond the duct threaded and having formed in one side thereof a plurality of spaced slots located between the threads and its other end, said mounting plate passageway walls having formed therein axially aligned apertures adapted to be Yaligned withany one of the side slots of the yaxle clamping bolt to more or less 'project the threaded end thereof beyond the mounting plate and duct, removable means extending through the aligned passageway walls apertures and axle clamping bolt slotv for securing i the axle clamping bolt against axial movement in the passageway, and a clamping nut on said projecting threaded end of the clamping bolt for securing the parts to one another.

. a plurality of spaced slots located between the threads and its other end, said mounting plate passage way Walls having formed therein axially aligned apertures adapted to be aligned with any one of the sidelslots of the axle clamping bolt y tomore or less project the threaded end thereof beyond the mounting plate and duct, removable means extending through the aligned passage Way Walls apertures and axle clamping bolt slot for securing the axle clamping bolt against axial movement in the passage Way, a clamping nut on said projecting threaded end of the axle clamping bolt for securing the parts to one another, a removable sleeve around the projecting axle clamping bolt between the clamping nut and the duct, an axle clamping bolt at the other end of the damper plate and projecting beyond the duct, said last named axle bolt projection being threaded, and clamping and lock nuts on said last mentioned axle clamping bolt.

6. In a damper mounting and regulator means,

" the combination with a conduit having a damper therein, of, a mounting plate secured to one side of the damper and having a passage therethrough, a separable axle clamping bolt insertable from within the conduit through the mounting plate passage and through and beyond the conduit, co-operating abutments respectively carried by the mounting plate and axle clamping bolt to limit the movement of said axle clamping bolt, said projecting end of the axle clamping bolt beyond the conduit being threaded, and a clamping nut on said threaded end of the axle clamping bolt for securing the damper in adjusted position.

7. In a damper mounting and regulator means,

^` the combination with a conduit having a damper therein, of a mounting plate secured to one side of the damper and having a passage therethrough, a separable axle clamping bolt insertable from Within the conduit through the mountjecting axle clamping bolt between the nut and j conduit.

8. In a damper mounting and regulator means, the combination with a conduit havinga damper therein, of a mounting plate secured to one side of the damper and having a passage therethrough, a separable axle clamping bolt insertable from Within the conduit through the mounting plate passage and through and beyond the conduit, (no-operating abutments respectively carried by the mounting plate and axle clamping bolt to limit the movement of said axle clamping bolt, said projecting end of, the axle clamping bolt beyond the conduit being threaded, a clamping nut on said threaded end of the axle clamping bolt for securing the damper in adjusted position, a removable sleeve around the projecting axle clamping bolt between the nut and conduit, a second mounting plate secured to the other side of the damper f and having a passage there through, a separable axle clamping bolt insertable through the mounting plate passage and through and beyond the conduit, co-operatlng abutments respectively carried by the mounting plate and axle clamping bolt to limit the movement of said axle clamping bolt, said projecting end of the axle clamping bolt beyond the conduit being threaded, and clamping and lock nuts on said threaded end of the last mentioned axle clamp ing bolt.

GOTTLIEB L. KERENTOFF. 

